4.7 fbx import problem

when i import a fbx object to 4.7 i get the alert “objectxy has degenerate tangent bases which will result in incorrect shading.”
ia also can see the issue based on this problem (dark edges on the mesh)

But in 4.6 i have no problem with this fbx object.

I’m having the same problem.

4.7 now sync with MikkTSpace tangent basis,which is what Xnormal uses by default. Check this thread(second post from the bottom):

I’m not sure what is kind of error you are getting, as I’m still on 4.6.1. When importing FBX, do you see an option call “Recompute Tangents”, try turning that off if you assets look wrong.

In 4.8 the option has been exposed in the Static Mesh Build settings to disable MikkTSpace.

This is fixed with CL-2519373.

I used to have this error. The fix for this problem is that you need to have your mesh fully unwrapped and then reimport it; you will have that message gone. I am not sure about the exact reason or process behind it but It worked for me. Hope it works for you.

Best Regards